Unveiling the oxidation behavior of liquid-phase exfoliated antimony nanosheets
Unveiling the oxidation behavior of liquid-phase exfoliated antimony nanosheets
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DOI：
10.1088/2053-1583/ab755e
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发表时间：
2020-04-01
期刊：
影响因子：
5.5
通讯作者：
Abellan, Gonzalo
中科院分区：
文献类型：
--
作者：
Assebban, Mhamed;Gibaja, Carlos;Abellan, Gonzalo
锑是一种单层的β-锑，由于其耐人寻味的物理和化学性质，比其他单元素二维材料更引起人们的关注。在常温条件下，锑具有较高的热力学稳定性和良好的结构完整性。一些理论计算预测，锑将具有较高的氧化倾向。然而，从实验的角度来看，对它的研究仍然很少。在这项工作中，我们研究了超声辅助液相剥离法制备的锑纳米片(ANS)的氧化行为。利用一系列前沿分析技术，发现超声时间对制备的ANS表面化学有明显的影响。观察到了一种动态氧化行为，在中温(210℃)下热处理导致了半导体行为，用紫外光电子能谱测得其禁带宽度约为1 eV。这项研究为锑的未来应用提供了有价值的信息，并为开发新的改性方法铺平了道路，以便调整其性质并补充其局限性。
Antimonene, a monolayer of beta-antimony, is increasingly attracting considerable attention, more than that of other monoelemental two-dimensional materials, due to its intriguing physical and chemical properties. Under ambient conditions, antimonene exhibits a high thermodynamic stability and good structural integrity. Some theoretical calculations predicted that antimonene would have a high oxidation tendency. However, it remains poorly investigated from the experimental point of view. In this work, we study the oxidation behavior of antimonene nanosheets (ANS) prepared by ultrasonication-assisted liquid-phase exfoliation. Using a set of forefront analytical techniques, a clear effect of sonication time on the surface chemistry of prepared ANS is found. A dynamic oxidation behavior has been observed, which upon annealing at moderate temperature (210 degrees C) resulted in a semiconducting behavior with a bandgap of approximately 1 eV measured by ultraviolet photoelectron spectroscopy. This study yields valuable information for future applications of antimonene and paves the way towards novel modification approaches in order to tailor its properties and complement its limitations.